A dealer in a casino has rolled a five on a single die three times in a row. What is the probability of her rolling another five on the next roll, assuming it is a fair die（）

A. 0.001.

B. 0.500.

C. 0.167.

“TFDS动态检查”的检查范围和预报质量标准规定：铁路货车制动缸活塞（）无丢失，连接管无折断。